class Settings:
    #设置专用

    def __init__(self):
        #初始化游戏设置
        #屏幕设置
        self.title="Alien Invasion"
        self.screen_width = 1200
        self.screen_height = 800
        self.bg_color=(230,230,230)
        self.fps=60
        #飞机设置
        self.ship_speed=2
        self.ship_weight=50
        self.ship_height=50
        #子弹上设置
        self.bullet_weight =50
        self.bullet_height =50
        self.bullet_speed =4
        